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arXiv · 1211.6676

Low-energy Electron Reflectivity from Graphene

R. M. Feenstra·N. Srivastava·Qin Gao·M. Widom·Bogdan Diaconescu·Taisuke Ohta·G. L. Kellogg·J. T. Robinson·I. V. Vlassiouk
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Abstract

Low-energy reflectivity of electrons from single- and multi-layer graphene is examined both theoretically and experimentally. A series of minima in the reflectivity over the energy range of 0 - 8 eV are found, with the number of minima depending on the number of graphene layers. Using first-principles computations, it is demonstrated that a free standing n-layer graphene slab produces n-1 reflectivity minima. This same result is also found experimentally for graphene supported on SiO2. For graphene bonded onto other substrates it is argued that a similar series of reflectivity minima is expected, although in certain cases an additional minimum occurs, at an energy that depends on the graphene-substrate separation and the effective potential in that space.

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R. M. Feenstra, N. Srivastava, Qin Gao, M. Widom, Bogdan Diaconescu, Taisuke Ohta, G. L. Kellogg, J. T. Robinson, I. V. Vlassiouk. 2013-01-31. Low-energy Electron Reflectivity from Graphene. https://doi.org/10.1103/physrevb.87.041406

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